Object-oriented programming allows procedures about objects to be created whose exact type is not known until runtime. For example, a screen cursor may change its shape from an arrow to a line ...

Before Object Oriented Programming One of the easiest ways to understand what is meant by ‘object oriented’, is to define what it is not. Before Object Oriented Programming (OOP) programs were ...

Using dot notation enhances run-time performance if you declare the object used in the dot notation as an instance of a predefined class instead of declaring it as a generic object. The object's class ...

Events alert applications when there is a change of state. Events occur when a user action takes place (such as a mouse click), when an attribute value is changed, or when a user-defined condition ...